<template>
  <view v-if="goods_info.goods_name" class="goods-detail-container">
    <!-- 轮播图区域 -->
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" circular="true">
      <swiper-item v-for="(item, i) in goods_info.pics" :key="item.pics_id">
        <image :src="item.pics_big" @click="preview(i)"></image>
      </swiper-item>
    </swiper>
    
    <!-- 商品信息区域 -->
    <view class="goods-info-box">
      <!-- 商品价格 -->
      <view class="price">
        ￥{{goods_info.goods_price}}
      </view>
      <!-- 商品信息主体区域 -->
      <view class="goods-info-body">
        <!-- 商品的名字 -->
        <view class="goods-name">
          {{goods_info.goods_name}}
        </view>
        <!-- 收藏 -->
        <view class="favi">
          <uni-icons type="star" size="30" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">
        快递：免运费
      </view>
    </view>
    
    <!-- 详情页 -->
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>
    
    <!-- 商品导航组件区域 -->
    <view class="goods-nav">
      <uni-goods-nav :options="options" :fill="true" :button-group="buttonGroup" @click="onClick"
      @buttonClick="buttonClick" />
    </view>
  </view>
</template>

<script>
  import {mapState, mapMutations, mapGetters} from 'vuex'
  
  export default {
    computed: {
      ...mapState('m_cart', []),
      ...mapGetters('m_cart', ['total'])
    },
    watch: {
      // total(newVal) {
      //   const findResult = this.options.find(x => x.text === '购物车')
      //   // console.log(findResult);
      //   if (findResult) {
      //     findResult.info = newVal
      //   }
      // }
      total: {
        handler(newVal) {
            const findResult = this.options.find(x => x.text === '购物车')
            if (findResult) {
              findResult.info = newVal
            }
        },
        // 页面加载完毕后立即调用
        immediate: true
      }
    },
    data() {
      return {
        goods_info:{},
        // 商品导航组件数据
        options: [{
        			icon: 'shop',
        			text: '店铺'
        		}, {
        			icon: 'cart',
        			text: '购物车',
        			info: 0
        		}],
        	    buttonGroup: [{
        	      text: '加入购物车',
        	      backgroundColor: '#ff0000',
        	      color: '#fff'
        	    },
        	    {
        	      text: '立即购买',
        	      backgroundColor: '#ffa200',
        	      color: '#fff'
        	    }
        	  ]
      };
    },
    onLoad(options) {
      const goods_id = options.goods_id
      this.getGoodsDetail(goods_id)
    },
    methods: {
      ...mapMutations('m_cart', ['addToCart']),
      async getGoodsDetail(goods_id) {
        const {data:res} = await uni.$http.get('/api/public/v1/goods/detail',{goods_id})
        if (res.meta.status !== 200) return uni.$showMsg()
        
        //处理goods_introduce, 用正则替换的方法为img加上行内样式
        res.message.goods_introduce = res.message.goods_introduce.replace(/<img/g, '<img style="display:block;"').replace(/webp/g, 'jpg')
        this.goods_info = res.message
      },
      preview(i) {
        uni.previewImage({
          current: i,
          urls: this.goods_info.pics.map(x => x.pics_big) //返回的是一个数组，里面包含所有的URL地址
        })
      },
      // 购物车按钮的事件处理函数
      onClick(e) {
        // console.log(e);
        if (e.content.text === '购物车') {
          uni.switchTab({
            url:'/pages/cart/cart'
          })
        }
      },
      buttonClick(e) {
        // console.log(e);
        if (e.content.text === '加入购物车') {
          // 阻止商品的信息对象
          // {goods_id, goods_name, goods_price,goods_count,goods_small_logo,goods_state}
          const goods = {
            goods_id: this.goods_info.goods_id,
            goods_name: this.goods_info.goods_name,
            goods_price: this.goods_info.goods_price,
            goods_count: 1,
            goods_small_logo: this.goods_info.goods_small_logo,
            goods_state: true
          }
          this.addToCart(goods)
        }
      }
    }
  }
</script>

<style lang="scss">
swiper {
  height: 750rpx;
  image {
    width: 100%;
    height: 100%;
  }
}
.goods-info-box {
  padding: 10px;
  padding-right: 0;
  .price {
    color: #C00000;
    font-size: 18px;
    margin: 10px 0;
  }
  .goods-info-body{
    display: flex;
    justify-content: space-between;
    .goods-name{
      font-size: 13px;
      margin-right: 10px;
    }
    .favi{
      display: flex;
      width: 120px;
      font-size: 12px;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      border-left: 1px solid #efefef;
      color: gray;
    }
  }
  .yf{
    font-size: 12px;
    color: gray;
    margin: 10px 0;
  }
}
// 底部购物车区域样式
.goods-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
}
// 防止导航区域遮挡页面内容
.goods-detail-container {
  padding-bottom: 50px;
}
</style>
